Radiating element for electric heaters



NOV. 5 1929. R, HUMPHREY 1,734,382

RADIATING ELEMENT FOR ELECTRIC HEATERS Filed May 28, 1927 B Y W ZTTORNZKP IN VENTOR Patented Nov. 5, 1929 UNITED STATES PATENT OFFICE HUBERT R. HUMPHBEY, OF KALAMAZOO, MICHIGAN, ASSIGNOR TO GENERAL GAS LIGHT COMPANY, OF KALAMAZOO, MICHIGAN Application filed May 28, 192?. Serial No. 195,019.

My improved radiating elements are especially designed by me for use 1n electr c heating stoves of the type shown in my appllcation for Letters Patent filed March 26, 1927,

5 Serial No. 178,664.

The main objects of this invention are to provide an improved radiating element for electric heaters in which the body forms an insulating means, not only for the reslstance 10 element, but also for the binding posts for the resistance element which constitute contact plugs or terminals and supporting elements.

A further object is to provide a radiating element of this class which is economical to 15 produce, is substantial, is not likely to be broken and at the same time 1s attractive 1n appearance.

Objects relating to details and economles of construction and operation of my invention 9 will appear from the detailed descriptlonto follow. The invention is defined and pointed out in the claims.

Astructure which is a preferred embodiment 53 of my invention is illustrated in the accompany drawing, forming a part of this spec1- fication, in Which:

Fig. 1 is a front elevation of one of my 1mproved heating elements.

Fig. 2 is a side elevatlon partially 1n section on line 22 of Fig. 1.

Fig. 3 is a rear elevation of my improved radiating element partially broken away.

Fig. 4 is a horizontal section on l1ne 4-4 of Fig. 1.

In the drawing similar reference characters refer to similar parts throughout the several views.

In the embodiment illustrated, the body 1 is molded from earthy material and is formed with a longitudinal channel-like recess 2 facing rearwardly, the walls, however, being 111lperforate eXcept as hereinafter pointed out. i The face of the body 1 is provided with a plurality of projecting lugs 3, undercut at 4:, the outer faces 5 of these lugs being flat and in the same plane, the face 6 of the body being, however, of curved cross section. These lugs are arranged to face laterally and in alternating or zig-zag relation.

The resistance element 7 is looped over these lugs, its upper end 8 being passed through a hole 9 in the upper end of the channel 2 and carried downwardly therein to the binding post 10. The other end 11 of the resistance element is connected to the binding post 12 andpassed through a hole 13 in the lower end of the channel.

The heads of the binding posts 10 and 12 are arranged between the channel, the bind ing posts being passed through the bottom 14. of the body and clamped therein by means of the nuts 15 which are arranged in recesses 16 in the lower end of the body, the posts projecting to provide supporting elements and socket plugs 17, the radiating elements being without metal bases or supports other than these posts which are secured directly to the insulating body.

At its upper'end, the radiating element is provided with a transverse notch-like recess 18 adapted to receive a retaining rod, as shown in my said application.

My improved radiating elements are attractive in appearance and economical to produce; at the. same time they are not fragile and the bodies being formed of suitable earthy or clay materials constitute an insulating means for the resistance elements and also combined binding posts and contact plugs.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A radiating element comprising an elongated body of earthy material having a rearwardly facing longitudinal channel-like recess therein, said body having laterally facing alternately disposed undercut lug-like projections on its face, a pair of binding posts arranged through the bottom wall of said body to project into said recess and projecting from the lower end of the body to provide contact terminals and supporting elements, clamping nuts on said binding posts, the lower end of said body being recessed to receive said nuts, and a coiled resistance element looped about said lugs, the front wall of said body having openings therethrough through which the ends of said radiating elements are passed into said recess, said ends being connected to said binding posts within said recess.

2. A radiating element comprising an elongated body of earthy material having a rearwardly facing longitudinal channel-like recess therein, said body having laterally facing alternately disposed undercut lug-like projections on its face, a pair of binding posts arranged through the bottom wall of said body to project into said recess and projecting from the lower end of thebody to provide contact terminals and supporting elements, and a coiled resistance element looped about said lugs, the front wall of said body having openings therethrough through which the ends of said radiating elements are passed into said recess, said ends being connected to said binding posts within said recess.

3. Aradiating element comprising an elongated body of earthy material having a plurality of laterally facing undercut lugs disposed in opposed zig-zag relation on its face and a longitudinal rearwardly facing channel-like recess closed at its ends, binding posts disposed through the bottom wall of said body to project from the lower end thereof, said binding posts being secured directly to said bottom wall of said body, their projecting ends constituting contact plugs, and a resistance elementlooped about said lugs and having its ends disposed throu h openings adjacent the ends of the said body and lying within and connected to said posts within said recess.

4. A radiatingelement comprising an elongatedbody of insulating material having a plurality of undercut lugs disposed in Zig-zag oppositely facing relation on its face and having a rearwardly facing longitudinal channel-like recess therein, binding posts disposed through the bottom of said body to project into said recess and from the lower end thereof to constitute contact plugs, and a resistance element looped about said lugs and having its ends connected to said posts within said recess.

5. A radiating element comprising an elongated body of insulating material having .a plurality of lugs disposed in alternating relation on its face'and having a rearwardly facing longitudinal channel-like recess therein, binding posts secured to the bottom of said body to project into said recess and from the lower end thereof to constitute contact plugs, and a resistance element looped about said lugs and having its ends connected to said posts within said recess.

In witness whereof I have hereunto set my hand.

'HUBERT R. HUMPHREY. 

